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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-30 21:50:32 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-11 21:23:48 +0200 |
| commit | a8584c6cbf5250b1f324ac55534c8a2e850c61cd (patch) | |
| tree | 61eec5304834d7bc43740af368f1ea5d713763ab | |
| parent | 7dcf0f1ebbfefede61d89ffccf932584fedde034 (diff) | |
| download | ffmpeg-a8584c6cbf5250b1f324ac55534c8a2e850c61cd.tar.gz | |
avformat/mpc8: Check remaining space in mpc8_parse_seektable()
Fixes: Fixes infinite loop
Fixes: 26704/clusterfuzz-testcase-minimized-ffmpeg_dem_MPC8_fuzzer-6327056939614208
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 4f66dd13d08d063e2748d172239df595078ff624)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mpc8.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c index 4bbee8f3b3..7c6c53e2a4 100644 --- a/libavformat/mpc8.c +++ b/libavformat/mpc8.c @@ -177,6 +177,10 @@ static void mpc8_parse_seektable(AVFormatContext *s, int64_t off) av_add_index_entry(s->streams[0], pos, i, 0, 0, AVINDEX_KEYFRAME); } for(; i < size; i++){ + if (get_bits_left(&gb) < 13) { + av_free(buf); + return; + } t = get_unary(&gb, 1, 33) << 12; t += get_bits(&gb, 12); if(t & 1) |